diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/librustc/diagnostics.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/librustc/diagnostics.rs b/src/librustc/diagnostics.rs index 10156d22501..2fd875c3447 100644 --- a/src/librustc/diagnostics.rs +++ b/src/librustc/diagnostics.rs @@ -2109,11 +2109,13 @@ type. For example, changing the return type to `impl Trait<'y> + 'x` would work: ``` +#![feature(conservative_impl_trait)] + use std::cell::Cell; trait Trait<'a> { } -impl Trait<'b> for Cell<&'a u32> { } +impl<'a,'b> Trait<'b> for Cell<&'a u32> { } fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y> + 'x where 'x: 'y |